580results about How to "Fully exposed" patented technology

The invention belongs to the technical field of transition metal sulfides, namely carbon materials, and particularly discloses a nickel cobalt sulfide/graphene/carbon nanotube composite material and a preparation method and an application thereof. The method comprises the following preparation processes: mixing graphene oxide with a carbon nanotube, and preparing a graphene oxide/carbon nanotube hybrid material through ultrasound; and carrying out in-situ growth of a nickel cobalt sulfide nanosheet on the graphene oxide/carbon nanotube hybrid material through a one-step hydrothermal process. The graphene oxide/carbon nanotube hybrid material prepared by the method has the advantages of a three-dimension porous space structure, excellent conductivity, large specific surface area, stable chemical property and the like; the final nickel cobalt sulfide/graphene/carbon nanotube composite material is controllable in morphology; the nickel cobalt sulfide nanosheet evenly grows on the graphene oxide/carbon nanotube hybrid material; and a unique base structure and high specific surface area of the graphene oxide/carbon nanotube hybrid material are fully utilized. The material disclosed by the invention can be used as an ideal high-performance electric catalytic material, and an electrode material for new energy devices of a lithium-ion battery, a super capacitor and the like.

The invention provides a method for preparing a high-performance molybdenum-based hydrogen evolution electrode by phosphatizing a molybdate precursor and belongs to the fields of water electrolysis and electric catalytic hydrogen evolution in the chlor-alkali industry. The method comprises the steps of pre-processing foamed nickel, growing the molybdate precursor in situ on the surface of a pre-processed foamed nickel base with the hydrothermal synthesis method, and finally placing the prepared precursor and a phosphorus source into a rube furnace together for phosphating of the molybdate precursor so that the high-performance molybdenum-based hydrogen evolution electrode can be prepared. The method is novel, the technology adopted is simple, production cost is low, the requirement for equipment is low, and the method is suitable for industrial production. Furthermore, the electrode is large in specific area, can be combined with the base firmly, has excellent hydrogen evolution activity and stability, and can be widely applied to the fields of water electrolysis and hydrogen evolution in the chlor-alkali industry.

The invention belongs to the technical field of transitional-metal sulfide-carbon materials, and concretely relates to a phosphorus-doped nickel cobalt sulfide/carbon nanotube-carbon nanofiber composite material and a preparation method thereof. The preparation method comprises preparing carbon nanotube-doped carbon nanofiber through electrostatic spinning and high-temperature carbonization, then growing nickel cobalt sulfide nanorod in situ through a hydrothermal process, and finally calcining a phosphorus-containing precursor at a high temperature in an atmosphere of an inert gas, so as to prepare the phosphorus-doped composite material. The prepared carbon nanofiber possesses relatively large specific surface area, and the electric conductivity is effectively enhanced by doping carbon nanotube. By taking the carbon naofiber as a substrate, nickel cobalt sulfide nanorod uniformly densely grows on the surface of the composite fiber, and the synergistic effect of various substances is fully displayed. By doping phosphorus, the electrochemical activity of the composite material is further improved. The prepared phosphorus-doped nickel cobalt sulfide/carbon nanotube-carbon nanofiber composite material is applicable as a high-performance electro-catalytic material and an electrode material of lithium ion battery, solar cells and other new-energy-source devices.

The invention belongs to the technical field of transition metal sulfide-carbon materials, and particularly relates to a vulcanized cobalt-nickel/graphene/carbon nano fiber composite material and a preparation method thereof. The preparation method includes the steps that polyacrylonitrile nano fibers are prepared through electrostatic spinning, oxidized graphene/polyacrylonitrile nano fiber aerogel is prepared through mechanical stirring and freezing drying, then graphene/carbon nano fiber aerogel is prepared through high-temperature carbonization, and finally, vulcanized cobalt-nickel nanosheets grow in situ on the graphene/carbon nano fiber aerogel through the one-step hydrothermal method. The vulcanized cobalt-nickel/graphene/carbon nano fiber composite material prepared through the method has the advantages that the material has a three-dimensional porous space structure, conductivity is good and chemical properties are stable, and can serve as an ideal high-performance electro-catalysis material and electrode materials of new energy devices such as lithium ion batteries and solar batteries.

The invention discloses an Android privacy disclosure behavior detection method and a system based on information flow. The method comprises the following steps: 1) extracting components, permissionsand intention filter information from resource files and Dex files to generate a control flow diagram between processes; 2) analyzing the callback sequence of the application program, constructing theCCFG (Callback Function Control Flow Graph), and checking the potential privacy leakage path by using the static stain tracking analysis ICFG and CCFG; 3) extracting context and attribute values of cross-component communication through HOOK key API in customized sandbox, and optimizing privacy information flow constructed by static analysis; 4) the run program tracking and analyzing the dynamic stain, obtaining the path of the flow direction of the privacy information, and simultaneously extracting the context of the path; 5) according to the privacy leakage paths generated by monitoring logsand stain tracking analysis, the redundancy being removed or new privacy leakage paths being added in combination with context information; 6) the general information entropy method and visual clustering method being used to quantitatively analyze the privacy information leakage.

The invention provides a delaminated hydrotalcite nano-sheet based composite catalyst and a preparation method therefor. The preparation method for the catalyst comprises the steps of introducing cationic active ingredients into a hydrotalcite laminate to form a precursor with a layered structure, then, carrying out swelling to enable the laminate to be delaminated into 1 to 10 layers, carrying out compounding on obtained hydrotalcite nano-sheets and a support with a special surface structure or electron features, and carrying out washing and drying, thereby obtaining the M1M2-ELDH/S catalyst, wherein M1 represents a divalent metal cation for forming a hydrotalcite structure, M2 represents a trivalent metal cation for forming the hydrotalcite structure, ELDH represents a delaminated hydrotalcite nano-sheet, and S represents the support. The catalyst has the characteristics that the variety and ratio of the active ingredients are adjustable; after the laminate is delaminated into 1 to 10 layers, an active center is exposed to the maximum, and the stability and cycle use performance of the catalyst can be improved after the active center is compounded with the support; and the hydrotalcite laminate and the support with the special surface structure and the electron features generate an interaction, so that the activity and selectivity of the catalyst are further improved.

The invention discloses a mutant human plasminogen kringle5 gene mK5 and an amplification primer of the mK5 gene, the mutant human plasminogen kringle5 gene modified by adding glutathione-S-transferase before the gene mK5, and a method for preparing protein mK5 recombinant protein of two gene codes, glutathioneS transferase (GST)-mK5 fusion protein and two proteins, wherein the mK5 gene and the GST-mK 5 gene can be applied to preparing medicaments for treating angiogenesis diseases. By the invention, the number of exogenous amino acid in the recombinant K5 protein molecules obtained by a gene engineering method is remarkably reduced, the K5 bioactivity of the obtained mK5 is improved, while the mK5 activity of the GST-mK5 fusion protein is maintained, the stability and water solubility of the protein are improved, the purification steps of an expressed product are simplified, and the purity of the product is improved.

A functional nanometer material/metal-organic framework composite is disclosed. The functional nanometer material is ferritin, carbon nano tubes or glucose oxidase. The metal-organic framework is HKUST-1. The mole ratio of the functional nanometer material to the metal-organic framework is 20-100:1. The functional nanometer material/metal-organic framework composite is provided. The functional nanometer material is uniformly dispersed in a copper hydroxide nanowire layer to enhance dispersity of the functional nanometer material, so that active sites on surfaces of the functional nanometer material are completely exposed, and the application scope of a metal-organic framework structure is broadened.

The invention belongs to the field of energy, and particularly relates to a preparation method for a single-walled carbon nanotube (SWCNT) hollow ball oxygen reduction catalyst, and an application of the SWCNT hollow ball oxygen reduction catalyst. The SWCNT hollow ball oxygen reduction catalyst is an SWCNT hollow ball oxygen reduction catalyst with co-doping of a transition metal and nitrogen, and the preparation method comprises the following steps: monodispersed oxidized SWCNTs are firstly self-assembled into SWCNT balls in the shape of hollow balls through the hard template method; the SWCNT hollow balls and a transition metal N4 cyclic compound are then sufficiently mixed; and calcination is then carried out in an ammonia or inert atmosphere to achieve the co-doping of the transition metal and the nitrogen, so that the SWCNT hollow ball oxygen reduction catalyst is obtained. The catalyst achieves efficient oxygen reduction catalysis performance, and can be used as an air electrode catalyst for hydrogen-oxygen fuel cells, zinc-air fuel cells, magnesium-air fuel cells, and aluminum-air fuel cells.

The invention relates to a method for preparing a rubber powder-supported pavement automobile exhaust degrading composite, which is a method for compounding rubber powder, titanium oxide powder having a photocatalysis function and a coupling agent. Due to a characteristic of huge specific surface area, the rubber powder can be used to absorb and carry the titanium oxide powder to a maximum degree and fully absorb and collect automobile exhaust over pavements. Therefore, the method has the advantages that: the photocatalysis function of the titanium oxide is effectively protected and fully used and the efficiency of the pavement automobile exhaust degradation of the titanium oxide is improved; meanwhile, due to the high elasticity of the rubber powder and the action of the coupling agent, corresponding products have high wheel rolling resistance and rain washing resistance and the service life of the photocatalysis is prolonged. The composite can be used on surfaces of traffic facilities needing automobile exhaust degradation, such as asphalt concrete and cement concrete pavements, tunnels and culverts.

The invention discloses a process for preparing fermented bean curd, which comprises the following steps of: decontaminating soybeans; soaking the soybeans; grinding the soybeans; separating the soybeans; regrinding the soybeans; putting first soybean dregs obtained by the step C into a stirring pool; adding proper amount of three kinds of seriflux, and stirring the mixture into a paste; delivering the paste into a regrinder for regrinding; delivering the paste into a centrifuge for secondary centrifugation, and merging the milk and the first milk into fresh soybean milk; boiling the soybean milk; pointing the soybean milk; blanking; early fermenting; salting blanks; filling; later fermenting; and obtaining finished products. The process has the advantages of reducing residual protein in the bean dregs and having high product yield.

The invention relates to a metallic bond, a diamond grinding wheel prepared through the bond and a preparation method of the diamond grinding wheel. The metallic bond comprises, by weight percent, 95%-99% of copper-tin prealloyed powder, 0.5%-3% of graphite powder and 0.5%-2% of nanometer alpha-Al2O3. The copper-tin prealloyed powder, the graphite powder, the nanometer alpha-Al2O3 and diamond are taken according to a certain proportion, procedures of burdening and material mixing, pelletizing, compression, sintering and aftertreatment are carried out in sequence, and tool bits can be prepared. The multiple tool bits are arranged on a matrix at equal distance in the circumferential direction, the cambered surfaces of the tool bits are perpendicular to the matrix, and the diamond grinding wheel is prepared. The above tool bits are uniform in ingredient and good in density, diamond distribution is uniform, and the control effect of the metallic bond on the diamond is good. The grinding wheel has the beneficial effects of being good in ground workpiece surface quality, free of dark cracks and scratches, sharp in grinding and long in service life, facilitating large-scale production and the like and is especially suitable for producing sapphire wafers with the thinning thickness ranging from 100 micrometers to 700 micrometers.

The invention discloses a preparation method of a membrane electrode and a preparation method of a membrane electrode anode catalytic layer. The preparation method comprises the following steps of immersing one surface of a proton exchange membrane into a platinum precursor/water solution; mixing a carbon carrier metal or a metal oxide with perfluorinated sulfonic acid resin, and after mixing, performing ultrasonic and uniform mixing in an organic solvent to form a black catalyst slurry; putting a prepared anode substrate catalytic layer into an electroplating grinding tool for pulse electrodeposition, introducing saturated nitrogen, and inserting an auxiliary electrode and a reference electrode; and setting the pulse frequency, the conduction and disconnection time and the pulse deposition total time, so as to prepare an anode catalytic layer in-situ embedded core-shell catalyst. By virtue of the preparation method of the membrane electrode, and the preparation method of the membraneelectrode anode catalytic layer provided by the invention, the preparation efficiency, the controllability and the precision of the preparation process are improved, and the cost can be lowered.

The invention relates to a cobaltosic oxide bead-chain-shaped fiber and a preparation method thereof. The preparation method comprises the following steps: adding a cobalt source to N,N-dimethylformamide (DMF), and fully stirring till the cobalt source is completely solved; and adding polyvinylpyrrolidone (PVP) to the solution, stirring to obtain a spinning solution, spinning the spinning solution by utilizing an electrostatic spinning technique to obtain fibers, and forging fiber samples to obtain the cobaltosic oxide bead-chain-shaped fiber. According to the cobaltosic oxide bead-chain-shaped fiber and the preparation method thereof, the one-step electrostatic spinning technique is utilized; a bead-chain-shaped structure is formed by controlling the property of a precursor raw material; the process is simple; the bead-chain-shaped structure is a one-dimensional structure formed by connecting Co3O4 monocrystal grains of similar granularity, the diameter is distributed uniformly, the shape is regular, the grains are completely exposed and are connected closely, and the specific surface area is relatively large; the cobaltosic oxide bead-chain-shaped fiber and the preparation method thereof have the wide application prospect in the fields of battery electrode materials, chemical catalysts, gas sensing and the like.

The invention belongs to the technical field of composite materials and more particularly, to a flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, its preparation method and application. The preparation method comprises the following steps: 1) placing melamine sponge into a tubular furnace and obtaining a self-supported porous carbon skeleton after high temperature carbonation; and 2) dissolving two kinds of metal salt and precipitating agent into de-ionized water for a metal-and-salt solution, and then immersing the porous carbon skeleton materials prepared in the step (1) into the metal-and-salt solution so that it undergoes processes of nucleating and growing under a hydrothermal condition, and filtering, washing, and drying. The preparation equipment and the technology are both simple and convenient. The prepared flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, with rapid transmission channels for electrons and ions, can achieve good elasticity and flexibility, high specific capacitance and good rate characteristics.

The invention discloses a nanosheet-nanorod coupled three-dimensional composite Ni-Co modified molybdenum carbide electrocatalysis hydrogen production catalyst and a preparation method thereof. The catalyst is a nanorod structure, and the nanorod is covered with a plicated nanosheet structure. In addition, bimetal Ni and Co are uniformly dispersed on the surface of the catalyst, and the molar ratio of the metal Ni to Co is 1: 0-1:1. The preparation method comprises the following steps; using MoO3 nanorod as a supporting network, adding nickel acetate and cobalt salt and fully stirring to forma suspension; placing the above suspension into water bath of 60-90 DEG C and stirring intensely for 4-7 h, standing overnight, filtering, washing and drying, and roasting in the air atmosphere of 450-550 DEG C. By the surface/interfacial effect between the molybdenum carbide material and loaded metal and based on the morphology features of the material itself, high dispersion of the metal Ni andCo is realized, and the catalytic active site is fully exposed. Meanwhile, with the strong interaction between the molybdenum carbide substrate and the loaded metal, stability of the catalytic material is effectively enhanced.

The invention discloses a method for strengthening gold extraction of an iron gold concentrate roasted product containing sulphur and arsenic. The high-iron gold concentrate containing sulphur and arsenic, especially high sulphur and high arsenic, hinders the subsequent chemical gold leaching process after being subjected to oxidation roasting pretreatment because of the problem that iron oxide is inevitably generated to wrap gold in a high-temperature reaction process. The invention proposes a new method for strengthening gold extraction of the iron gold concentrate roasted product containing sulphur and arsenic by a flow of 'metallized reduction roasting-acid leaching-gold leaching', namely a method for strengthening gold extraction of the iron gold concentrate roasted product containing sulphur and arsenic aiming at the problem. The method comprises the steps of firstly, carrying out metallized reduction roasting on the iron gold concentrate roasted product containing sulphur and arsenic with a reducing agent, carrying out acid leaching on the metalized roasted product, and finally carrying out chemical leaching with an acid slag. By adopting the method disclosed by the invention, the leaching rate of the iron gold concentrate roasted product containing sulphur and arsenic is higher than 95%; and important theory and technical guidance are provided for effective gold extraction of the gold roasted product.

The invention relates to an iron and nitrogen co-doped carbon oxygen reduction catalyst. The preparation method comprises steps: a carbon carrier is dissolved in an organic solvent, ultrasonic dispersion for being uniform is carried out, soluble iron salt is added under a stirring condition, and after uniform mixing, a mixed solution is obtained; the mixed solution is transferred to a reaction kettle, a reaction is carried out under the stirring condition, the reaction solution after the reaction is subjected to solid-liquid separation, washing and drying to obtain a solid material, the solidmaterial and a nitrogen source are mixed and grinded, and a pyrolysis precursor is obtained; and the pyrolysis precursor is roasted in an inert atmosphere to obtain the iron and nitrogen co-doped carbon oxygen reduction catalyst, wherein the carbon carrier is Ketjen black nano carbon black particles. Compared with the prior art, the method has the advantages of high oxidation reduction catalytic activity, good electrochemical stability, simple and controllable preparation method, short period, rich raw material reserves, low cost, capability of realizing large-scale production and the like.

The invention provides a vertical graphene loaded carbon nano tube composite electrode material and a preparation method thereof, and an application of the composite electrode material in an all-solid-state zinc-air battery, and belongs to the technical filed of all-solid-state metal-air battery electrode materials. A vertical graphene nanosheet array is grown on a piece of carbon cloth by utilizing a radio frequency plasma enhanced chemical vapor deposition technology, and then the vertical graphene nanosheet array is immersed into a Zif-67 precursor solution to be soaked for 20h, and then washing and drying are carried out, and calcining is performed by a chemical vapor deposition technology; and under the atmosphere of hydrogen and argon, melamine provides a nitrogen source, and a carbon nano tube grows on the vertical graphene loaded Zif-67 precursor. The prepared material shows excellent catalytic performance in the aspects of ORR and OER, and when the material is used as the negative electrode of the all-solid-state zinc-air battery, excellent electrochemical performance and cycling stability are shown, so that the material has a wide application prospect in the technical field of all-solid-state metal-air battery electrode materials.

The invention relates to a two-dimensional transition metal carbide/titanium dioxide/graphene composite material, preparation and application thereof. The prepared composite material is composed of graphene, oxide, and two-dimensional transition metal carbide. According to the two-dimensional transition metal carbide/titanium dioxide/graphene composite material of the sandwich structure constructed by the invention, due to the intercalated structure, self-stacking of sheets of graphene and two-dimensional transition metal carbide can be prevented, and capacitive active positions are increased. The small amount of oxide titanium dioxide produced by a thermal reduction process can provide the embedded pseudocapacitance activity, and the large-sized graphene sheet layer can also enhance the electrical conductivity between the two-dimensional transition metal carbide sheets, further improving the electrochemical performance of the composite material and the performance of a lithium ion capacitor.

The invention relates to a process of drying-grinding by using vertical roller mill, belonging to fluidizing roasting technique. It comprises following steps: coarse crushing, middle crushing coal and ore exploited from well, conveying crushed coal and ore to high-pressure vertical grinding roller through belt conveyer for drying grinding; the high-pressure vertical grinding roller drying coal and ore by using hot wind got from cyclic induced draft fan, the water content of dried ore is less than 2%; dried grinding coal and core in vertical grinding roller, classifying grinded material, discharging qualified material, feeding it into cyclone dust collector; returning unqualified material into roller for grinding; discharging cyanide leached hot calcine from discharge port of boiling calcining furnace. The invention is characterized by simplified process, saved area and investment, good coal distribution, homogenous burning, good baking effect in equilibrium temperature furnace, increased leaching ratio for goal materials and adequate utilization of excess heat resources.

The invention relates to a method using SiO2-CoO composite aerogel as the absorbent to remove thiophene sulfur in gasoline and belongs to the technical field of gasoline processing. The method includes: filling the SiO2-CoO composite aerogel into a fixed bed absorption device, and feeding simulated gasoline containing thiophene or benzothiophene under certain airspeed; collecting the absorbed simulated gasoline at the lower outlet of the reactor, and performing gas chromatography. The gas chromatography result shows that the SiO2-CoO composite aerogel can well absorb the thiophene and benzothiophene. The SiO2-CoO composite aerogel absorbent is simple to prepare, low in cost, reusable, convenient to operate, environmental friendly, high in economic benefit, mild in absorption condition and low in absorption equipment requirement.